How do you know if someone is mature or not?

As per a dating expert, who has worked for a dating app for years, there is a list of some behaviors of mature people in the world of dating.

They recognize the power of words and know how to use them.
They don’t have an unhealthy relationship with their mothers. How a man treats his mother is how he will treat all women in his life.
They don’t do things just to please others
They won’t run away from their problems
They don’t go about criticizing a person in their lives for their appearance, weight, profession, or even their hopes and dreams.
They are more sensitive and always take time to listen.
They fully understand the fact that relationships can’t be perfect
They’re likely to have an effective communication style.
They won’t make their partners feel unwanted.
They won’t expect others to take responsibility for him.
They won’t be a know-it-all.
They don’t take things personally.
They won’t immediately reject other people’s opinions.
They don’t let fear keep them from achieving happiness and success.
They don’t feel insecure about their appearance and style.